Typewriting-machine



L. P. DISS.

TYPEWRITING MACHINE.

APPLICATION man NOV-12.1919- Patented July 5, 1921.

2 SHEETS-SHEET 1 L. P. DISS. TYPEWHITING MACHINE.

APPLICATION FILED NOV. 1,2, 1919. l 383,699, Patented July 5, 1921.

2 SHEETS-SHEET 2.

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uNira-n stares LOUIS l. DISS, OF ILION, NEW YORK, ASSIGNOR TO REMINGTON TYPEWRITER COM- PANY, OF ILION, NEW YOBKQA CORPORATION OF NEW YORK.

PATENT OFIFIC'FE- TYPEWRITING-MACHINE.

Application fi1ed November 12, 1919.

To all whom it may concern:

Be it known that 1, Louis P. Drss, a c1t1- Zen ofthe United States, and a resident of Then, in the county of Herkimer and State of New York have invented certain new and useful Improvements in Typewriting- Machines;and I do hereby declare that the following is a full, clear, and exact'description thereof, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the reference-numerals marked thereon which form part of this specification.

My present invention relates to type writing machines.

The purpose of my inventionis to provide improved means for automatically looking the escapement wheel or mechanism of a type writing machine from operat1orrduring the retraction of the carriage and, elther separately therefrom or eomblned therewith, improved means for locking the escapment 'mechanism from operation after the carriage has completed a pre-determined line.

Further purposes of my invention are to provide simple, eflicient and durable arrangements and combinations of parts and elements for accomplishing the general ends desired.

another object is to provide automatically-operating locking mechanism of either or both of the kinds mentioned that will be entirely out of the way and stationary until the occasion arises for them to become operative.

Figure 1 is a rear elevation of the relevant parts of a type writing machine embodying my invention the frame being shown in section.

Fig. 2 is a top or plan view of the same as seen from the rear of the machine but with all but the two operating teeth of the escapement wheel removed.

Fig. 3 is a vertical sectional view of the escapement wheel and a left hand side elevation of the dog rocker as seen from Flg. 1.

Referring to the drawings 1n a more particular description it will be seen that I have illustrated my invention in connection with a modified No. 10 Remington typewriter. The frame includes top plate 10 supported by rear posts 11 and forward Specification of Letters .Patent.

Serial No. 337,434.

posts 12. Upon the frame is a movably mounted carriage of which there is shown only the hook 13'whereby the carriage is connected to one end ofthe carriage'strap 1d, the other end of which is: connected to and wound'upon the band wheel 15 uponthe frame of the typewriter in the usual way so as to yieldingly draw the carriage across the machine during the writing movement of the machine. During retraction of the earriage in the usual way and by the usual methods the carriage strap 14 would have its direction of movement reversed and would be unreeled from the band wheel 15. The machine being viewed from the "rear in Figs. 1 and 2, it will be understood that during the feeding or writing movement of the machine the carriage strap 14 will pass from left to right and during retraction of the carriage the carrlage strap will be movmounted upon the dog rocker 19. Said dog rocker 19 is suitably mounted upon the frame of the machine and operates: in the Patented July 5, 1921.

successively disengaged from the dog 22 way common to this type of escapement mechanism, so will be only briefly described. The dog rocker is shown as mounted upon a horizontal shaft 21 at right angles to the axis of the horizontal shaft .of the escapement wheel 16. Upon the body of the dog rocker there is provided an upwardly eX- tending holding dog 22 rigidly secured to or integral with said dog rocker. The stepping dog 18 is upon the forward side of the dog rocker or upon the further side as the parts are seen in Fig. 1. Said movable or stepping dog 18 is mounted upon the dog rocker as by meansof said dog having-a pivot shaft 23 extending through the body of the dog rocker from the forward to the rocker.

rear side and there provided with a collar 24 to which the pivot is secured as by pin 25. This collar 24 conveniently forms the means of keeping the pivot 23 in place and also forms the means of connecting said movable dog to its spring 26 which is coiled about the rearward extension 27 formed upon the dog rocker. One end of said spring is secured to the collar 2d While the forward end of said spring is secured to the dog The tension of said spring is such as to yieldingly force the upper end of said dog 18 to the right as shown in F ig. 1, or against the teeth 17 of the escapement wheel 16. WVhile the machine is in readiness for its forward movement but the escapement mechanism is not being operated the said stepping dog 22 occupies the position indicated in Fig. 1 where its face is in line with the face of the fixed dog 22. A set screw 28 in the upper end of the dog rocker, to the left of the stepping dog 18, has its forward end extended through the dog rocker and serves as a stop to prevent the stepping dog from being forced beyond this position through the tendency of the escapement wheel 16 to move in a clock-wise direction. The escapement mechanism is operated through the downwardly extending lug 29 upon the dog rocker 19, being moved rearwardly of the machineor to the right as the parts are shown in Fig. 3 by means of operating link 30 which is connected with the rest of the machine so as to receive a rearward impulse upon depression of any type key or upon depression of any of the spacing keys in the usual manner. A link for this purpose and suitably connected with the remainder of the machine, is shown in the Seib patent hereinbefore referred to. The result of the rearward movement of the lug 29 is to move the upper part of the dog rocker forward so that the stepping dog 18 is moved forwardly of the machine and out of engagement with its tooth 17 and the fixed dog 22 upon the dog rocker is immediately brought into engagement with that tooth. As soon as the stepping dog 18 is disengaged from its tooth 17 of the escapement wheel, through the tension of its spring 26 it moves forward its proper distance preliminary to engaging the next succeeding tooth as 17 of the escapement wheel which engagement occurs as soon as the dog rocker returns to normal position through tension of the rocker spring 31. As the dog rocker returns to normal position the fixed or holding dog 22is disengaged from its tooth 17 a of the escapement wheel and said escapement wheel moves one step forward bringlng therewith the stepping dog 18 which has now been I brought into engagement with the succeeding tooth 17 of the escapement wheel. The spacing movement comes to an end as the escapement wheel comes to the relative position shown in Fig. 1 with the tension communicated through said escapement wheel being sufficient to force the stepping dog 18 back against its stop 28 against the tension of its spring 26.

According to the usual and proper operation of the typewriter, when the last letter has been written at the end of a line of writing the escapement stands in the position shown in Fig. 1 with the tooth 17 in engagement with the stepping dog 18. During the retraction of the carriage to begin a new line said dog 18 continues in engagement with the said tooth 17 The return movement of the carriage is arrested by the usual margin stop and when the carriage is released by the operator to the control of its driving spring and of the escapement, the latter will then occupy the position shown in Fig. 1. By this means all of the lines of writing will begin at the same letter space position and the page of writing will have an even left-hand margin. If, however, a key be struck after the carriage has moved as far as it can in letter feed direction or during the pull or push on the carriage to retract it, then the escapement wheel 16, being out of control of the carriage spring, has nothing to turn it any further and the stepping dog 18 will escape from the tooth 17 and come back into position to arrest the tooth 17 When now the carriage is retracted and arrested by its margin stop and released on account of the false step of the dog just referred to, said carriage will step down one letter space before being arrested by the escapement, with the result that that particular line of writing will begin a letter space farther to the right than the other lines, thus producing an unevenness in the lefthand margin of the page of writing. To obviate this unevenness in the margin is one of the reasons why I have provided means to prevent the escapement wheel and hence the carriage from making a false step when the carriage is released after a retractive movement.

Securely mounted upon and secured to the top plate 10 there is a stop spring 32 in the form of a leaf spring with its free end extending to the left as the parts are seen in Fig. 1 and in line with-the teeth 17 of the escapement wheel 16. As the escapement wheel rotates for its ordinary feeding movement the teeth 17 depress the projecting end of said stop spring, which however springs back to normal position as soon as each tooth is passed and forms a stop operating against the back of the tooth last passed to prevent undue backward movement of said escapement wheel when the tension thereupon is not operative as during retraction of the carriage. While a stop spring of this general character is used upon the form of typewriting machine mentioned, in the embodiment of my invention, my said stop spring does not closely engage the back of the teeth 17 but has its free end spaced a little therefrom thus allowing the escapement wheel to make a backward movement amounting to part of a letter space when the tension upon. the escapement wheel is overcome as during retraction of the carriage for a purpose to be hereinafter pointed out.

To the right of the escapement mechanism as the parts are seen in Figs. 1 and Q'there is provided and located upon the top of the top plate 10 a bracket 33 providing the bearing for a short rock shaft 3 1, to the rearward end of which or the near end of which, as the parts are viewed in Figs. 1 and 2, there is fixed the locking arm 35. The free end of said locking arm 35 is in line with the space normally left between the tooth 17 upon the escapement wheel and an ear 36 provided upon the dog rocker 19 opposite said tooth 17 The arm 35 is adapted'to be moved so that its end will enter the space left between said ear 36 and escapement wheel tooth 17 or may be withdrawn from that position to the position shown in Fig. 1. hen said locking arm is moved into the space between said car 36 and the tooth 17 it looks or blocks any movement of thesecapement mechanism for the reason that the first step of an escapement movement is to have the upper end of said dog rocker move forwardly of the machine as herein above described. It will be seen therefore that as long as the locking arm 35 is in looking position the escapement mechanism will be locked or rendered inoperative and further forward or feeding movement of the carriage will be prevented.

It will be understood that the use of the escapement wheel tooth 17 in this locking mechanism is not essential but is used as simply the most convenient part of the machine fixed against forward movement against which the forward side of the locking arm may be braced when said locking arm is moved into position against the ear 36 upon the dog rocker. The locking arm 35 and its connected parts might be made large enough and stifi enough to perform this work without the arm being braced near its free end. But for quickness and delicacy of operation I prefer to form said locking arm 35 relatively light and brace its free end against some part of the machine which is fixed against forward movement. It will be obvious that the locking arm could be braced by any other adjacent part of the machine suitable for that purpose. It will be understood that the free end of the arm 35 is suflicient in thickness to occupy the space left between the ear 36 upon the dog rocker and the oppositely located tooth 17*. On the other hand the ear 36 is so arranged and spaced from the escapement wheel and its teeth 17 that when the locking arm is not interposed the dog rocker may make its usual motion and its forward end move forward carrying therewith the ear 36 without the said ear engaging any of the teeth upon the escapement wheel.

The means for moving the locking arm 35v into position during retraction of the carriage and for disengaging said locking arm during the feeding movement of the carriage is a shoe or other suitably shaped member 37 fixed upon the forward end of the rock shaft 34: above and in line with and extending down to the carriage strap 14. The bottom ofsaid friction shoe or member '37 is in the form of, a part of a wheel and in constant light frictional engagement with the carriage strap.

During the feeding movement of the carriage the carriage strap 14 passes toward the right of the machine as the parts are seen in Figs. 1 and 2 and through the frictional engagement of theshoe 37 withsaid strap the locking arm 35 is moved downward or out of locking engagement with the dog rocker. After the locking arm has thus been moved into inoperative position further movement of the carriage and carriage strap simply results in the strap sliding by the friction shoe 37 and operates to keepsaid locking arm depressed. As soon as the carriage starts to be retracted the direction of movement of the carriage strap 14: is reversed and said strap moves to the left as the parts are seen in Figs. 1 and 2. The frictional engagement between said strap and the friction shoe 37 at once moves said shoe 37 in the same direction or to the left and thereby elevates the free end of the locking arm 35 into locking engagement with the dog rocker. Further retraction of the carriage causes the carriage strap to slip past the friction shoe 37 and simply exerts sufficient friction to keep the locking arm elevated into locking position.

The considerable space shown between the tooth 17 of the escapement wheel 16' and the stop spring 32 is to insure a feed movement of the carriage after its retraction is completed and before it can come to'a state of rest for the commencement of a line of print.

The said feed movement is a fraction of a letter space whereby the interposing arm 35 is moved out of the path of the car 36 and whereby the escapement in released. During the retraction of the carriage, the stepping dog 18 is released from the force of the carriage feeding spring whereby the weaker spring 26 is free to actuate the stepping dog 18 and whereby the escapement wheel 16 is turned back until the tooth 17 butts against the stop spring 3.2. Thus the carriage is prevented from reaching its state of rest or printing position until it has 'made a fraction of a letter space movement sufficient to move the interposing arm out of the path of the ear 36.

I will now point out the construction whereby part of the above described means including said interposing arm used for effecting a locking of the escapement mechanism during the return movement of the carriage may with additional parts be used also or only to perform the usual function of a line-lock that is to prevent type reaching the platen after a line of print of predetermined length is completed.

The said improved line-lock consists of means'for actuating the interposing arm 35 by the feeding movement of the carriage whereby its movement will be in the opposite direction to its movement effected by the carriage strap 14 during feeding movement of the carriage.

For said purpose there is provided the rock shaft 39 supported as shown by the front and rear posts 12 and 11 respectively of the main frame. On the rock shaft 39 are mounted the front and rear arms 42 and 43 by means of suitable collars 44 and 45 fitted to the shaft, each having a set screw for fastening the collar to the rock shaft.

The rear arm 43 is suitably formed and extended to engage an arm projecting upward from the shaft 34 carrying the shoe 37. The front arm 42 extends upward and has its upper end suitably formed to bear against a suitable abutment formed on the end of the slide 51 which is operatively supported and guided by the head and shoulder of the screw 52. To the slide 51 is pivotally connected the arm 53 which is formed with the car 54 to coia'perate with means 55 which cooperate with adjustable stops 56 on the carriage whereby lengthwise movement is transmitted to the slide 51 b the feeding movement of the carriage. arts like the slide 51, arm 53, device 55 and margin stop 56, have been in extensive use for a number of years in the Remington typewriters Nos. 10 and 11.

It will now be seen that when a predetermined line of print is completed the further feed movement of the carriage will actuate the interposing arm 35 whereby it will be moved into the path of the car 36, and thereby directly block the escapement and indirectly block the key levers.

What I claim as new and desire to secure by Letters Patent is;

1. In a typewriting machine, the combination of a frame, a carriage movably mounted thereon, a carriage strap operatively connecting the carriage and the frame, tensioned to move the carriage for its writing movement and having its direction of movement reversed when the carriage is retracted, escapement mechanism including a movable member the movement of which is necessary for the operation of the escapement mechanism, an arm adapted to be moved into position to engage the said movable escapement member and prevent operation thereof or to be withdrawn therefrom, a movably mounted shoe frictionally engaging the carria e strap and moved thereby according to t e direction of movement of the strap, and means operatively connecting said arm and said friction shoe whereby the arm is moved into locking engagement with the movable escapement member when the carriage is being retracted and the arm is disengaged when the carriage is making its writing movement. 7

2. In a typewriting machine, the combination of a frame, a carriage movably mounted thereon, a carriage strap operatively connecting the carriage and the frame, tensioned to move the carriage for its writing movement and having its direction of movement reversed when the carriage is retracted, escapement mechanism including a dog rocker the movement of which is necessary for the operation of the escapement mecha nism, an arm adapted to be moved into position to engage the said dog rocker and prevent operation thereof or to be withdrawn therefrom, a movably mounted shoe frictionally engaging the carriage strap and moved thereby according to the direction of movement of the'strap, and means operatively connecting said arm and said friction shoe whereby the arm is moved into locking engagement with the dog rocker when the carriage is being retracted and the arm is disengaged when the carriage is making its writing movement. 1

3. In a typewriting machine, the combination of a frame, a carriage movably mounted thereon, a carriage strap operatively con necting the carriage and the frame, tensioned to move the carriage for its writing movement and having its direction of movement reversed when the carriage is retracted, escapement mechanism including a dog rocker the movement of which is necessary for the operation of the escapement mechanism, an arm adapted to be moved into position to engage the said dog rocker and prevent operation thereof or to be withdrawn therefrom, a movably mounted shoe frictionally engaging the carriage strap and moved thereby according to the direction of movement of the strap, and a rock shaft supporting said arm and said friction shoe whereby the arm is moved into locking en gagement with the dog rocker when the carriage is being retracted and the arm is disengaged. when the carriage is making its writing movement.

4. In a typewriting machine, the combination of a frame, a carriage movably mounted thereon, means operatively connecting the carriage and the frame,a member moving in one direction when the carriage is making its feeding movement and moving in the other direction when the carriage is being retracted, escapement mechanism including a movable partthe movement of locking position when the carriage is being retracted and is disengaged when the carriage is making its writing movement.

5. In a typewriting machine, the combination of a frame, a carriage movably mounted thereon, escapement mechanism for the carriage, a member moving inonedirection when the carriage is making 1ts feeding movement and moving in the other direction when the carriage is being retracted, a locking member adapted to be moved into position to lock said carriage escapement from movement, a movably mounted shoe frictionally engaging the said tWo-way-moving member and moved thereby and means operatively connecting said locking member and said friction shoe whereby the locking member is moved into locking position when the carriage is being retracted and is disengaged when the carriage is making its writing movement.

6. In a typewriting machine, the combination of a frame, a carriage movably mounted thereon, escapement mechanism including a movable member the movement of which is necessary for the operation of the escapement mechanism, an arm adapted to be moved into position to engage the said movable escapement member and prevent operation thereof and to be withdrawn therefrom, a finger movably mounted on the frame and adapted to be moved by the carriage when the carriage comes to the predetermined end of the line, means operatively connecting said finger and said arm whereby the arm is moved into locking engagement with the movable escapement member when the carriage moves said finger and a frictional connection between said arm and said movable carriage for withdrawing said arm from locking engagement.

7. In a typewriting machine, the combina tion of a frame, a carriage movably mounted thereon, a carriage strap operatively connecting the carriage and the frame, tensioned to move the carriage for its writing movement and having its direction of movement reversed when the carriage is retracted, escapement mechanism including a movable member the movement of which is necessary for the operation of the escapement mecha nism, an arm adapted to bemoved into position to engage-the said movable escapement member and preventoperation thereof or to be withdrawn therefrom, a movably mounted shoe frictionally engaging the carriage strap and moved thereby according to the direction of movement of the strap, means operatively connecting said arm and saidfriction shoe whereby the arm is moved into locking engagement with the movable escapement member when the carriage is being retracted and the arm is disengaged when the carriage is making its writing movement, a finger movably mounted on the'frame and adapted to be moved by the carriage when the carriage comes to the pre:

determined endof the line, and means oper atively connecting said finger and said arm whereby the arm 18 moved H1130; locking engagement' with the movable escapement;

member when the carriage. moves said finger.

8. In a typewriting machine,vthe combination of a letter spacing escapement and frictionally actuated means for blocking and unblocking the escapement whereby printing is prevented during the retraction'of the carriage and whereby printing is allowed during: the feeding movement of the carriage.

9. In a typewriting machine, the combination of a letter spacing escapement, frictionally actuated means for blocking and un blocking the escapement, and means actuated by the feeding movement of the carriage for causing the said blocking means to function, whereby printing is prevented from the time of completion of said line of print until completion of the retractive movement of the carriage for the commencement of a new line of print.

10. In a typewriting machine, the combination of-a carriage, a letter spacing escapement, frictionally actuated means for blocking the escapement, and line locking devices connected with said blocking means, the said blocking means being caused to function on the completion of a line of writing and maintained in blocking position during the retraction of the carriage.

11. In a typewriting machine, the combination with a carriage and a letter feed escapement, of a device cooperating with a member of said escapement to prevent a false operation thereof, and a frictional connection to render said device operative during the return motion of the carriage and non-oper ative during the advance of the carriage.

12. In a type'writing machine, the combination with a carriage and a letter feed es capement, of a lever having one arm adapted to cooperate with a member of said escapement to prevent a false operation thereof and having another arm frictionally actuated whereby the first mentioned arm is held out of engagement with said escapement member during the advance of the carriage and held in engagement therewith during the retraction of the carriage.

18. In a typewriting machine, the combination of a carriage, a letter space escapement, and means for blocking a part of the escapement by a retractive movement of the carriage, said means being frictionally actu ated.

14. In a typewriting machine, the combination of a carriage, a'letter spacing escapement, and means for blocking a part of said escapement, said means being thrown into action during a retractive movement of the carriage and before the end of said movement.

15. In a typewriting machine, the combination of a carriage, a letter spacing escapement, a device for blocking a part of said escapement, and means for actuating said device extending to a part traveling forth and back with the carriage whereby said blocking device is moved into blocking position during a backward movement of said carriage.

16. In a typewriting machine, the combi nation with the printing means, the carriage and the letter feed escapement, of means including a frictionally actuated device for engagement with said escapement to prevent a false step of the carriage between the ending of one line of writing and the printing of the character beginning the neXt succeeding line.

17 In a typewriting machine, the combination of a carriage, a letter spacing escapement, and means operative by a retractive movement of the carriage for preventing the escapement wheel from turning a falsetoothspace at the beginning of a new line before the printing of the first letter thereof shall have been effected.

18. In a typewriting machine, the combination of a carriage, a letter spacing escape.

ment, a device for engaging a part of said escapeinent', and means for maintaining said device out of action during the operation of writing and bringing said device into action during the return motion of the carriage.

19. In a typewriting machine, the combination of a carriage, an escapement mechanism, a blocking means therefor and means connected with the carriage for holding the blocking means inoperative during the forward letter spacing movement of the carriage.

In witness whereof I have afiiXed my signature this third day of November, 1919.

Louis P. niss. 

